The formation Micro-Conductivity Imager Tool (MCI) provides detailed borehole resistivity image data. The tool consists of six pads that are pushed against the borehole wall by independent hydraulic arms. Pad force is controllable to ensure all pads consistently contact the borehole wall during logging which is essential to obtaining high quality image data. Each pad contains twenty-four (24) buttons surrounded by a metal pad which acts as a focusing guard electrode.

There is a total of 144 buttons providing high quality micro-resistivity measurements with vertical and azimuthal resolution of 0.2’’. In an 8-1/2” borehole the six pads provide a 60% borehole wall coverage. Pad transmit power (EMEX) is provided by independent surface DC power system to ensure high quality images even in the most challenging mud environments. The pad button measurements are scaled to resistivity values so that they can be correlated with conventional shallow measurements.